Samuel g



(No Model.)

S. G. STODDARD.

GAS BURNER. NO. 593,730. Patented Nov 16,1897.

UNITED STATES PATENT FFICE.

SAMUEL G. STODDARD, OF BRIDGEPORT, CONNECTICUT, ASSIGNOB TO THEBRIDGEPORT BRASS COMPANY, OF SAME PLACE.

GAS-BURNER.

SPECIFICATION forming part of Letters Patent No. 593,730, dated November16, 1897. Application filed July 16, 1897- Serlal No. 644,858. (Nomodel.)

To all whom it mag concern.-

Be it known that I, SAMUEL G. STODDARD, a citizen of the United States,residing at Bridgeport, Connecticut, have invented a new and usefulImprovement in Gas Burners, of which the following is a specification.

My invention relates chiefly to that class of gas-burners adapted toproduce a Bunsen or heating flame. It is intended to provide a means forregulating the flow of gas through the burner.

In the accompanying drawings, Figure I represents, partly in verticalsection, partly in elevation, so much of a Bunsen gas-burner as isnecessary to show myinvention. Figs. II and III showa part of my devicein course of construction and detached from the remainder. Figs. IV andVare sections through the line a: 00, Fig. I, showing the device in twopositions. The last four figures are on an enlarged scale.

at 11; 2, a mixing-chamber the lower shell 21 of which is provided withgas-passages 22, windows or apertures 23, and slots 24; 3, aregister-plate having a dished or depressed central portion3l,perforations 32,and lugs 33.

In the example of my invention illustrated in the drawings theburner-base 1 is internally threaded at 11 to engage with an ordinarygas-fixture.

. a mixing-chamber 2, which, as shown, is comthe apertures 22 in theshell 21.

posed of two frusto-conical shells, united at their bases, and asuperposed tubular portion. The lower shell 21 of the mixing-chamber hasan axial depressed or dished portion within the burner-base 1, in whichis pierced a plurality of gas-passages 22. A plurality ofannularly-disposed slots 24 is cut through the shell 21, the. functionof which will hereinafter appear. The usual air-admission apertures orwindows-23 may be pierced in the shell 21 and may be provided with theordinary registering shutter, which, as it forms no part of myinvention, I have not shown in the drawings. 'The registering plate 3'iscentrally dished at 31 to snugly fit the shell 21. It is provided with aplurality of perforations 32, corresponding in number and position to Asshown,

At its upper end is secured the perforations 32 are of greater lengththan breadth and diagonal of the radius of the shell.Apluralityofradially-projectinglugs 33, corresponding in number andposition to the slots 24, are secured to or preferably formed integralwith the'plate 3, as shown in Fig. II, are bent down, as shown in Fig.III, and are passed through the slots 24 and curled over on themselves,as shown in Figs. I, IV, and V.

The operation of my device will be readily understood from an inspectionof the drawings. It will be seen that the dished portion 31 of the plate3 fits closely into theshell 21. These parts may be ground together tosecure a more perfect joint, if desired. The apertures 22 and 32 areadapted to register, as shown in Fig. IV, thereby permitting a free flowof gas into the mixing-chamber 2. By turning the plate 3 to the positionshown in Fig. V the flow of gas is entirely out off. The 1 designatesaburner-base, screw-threaded.

lugs 33, passing through the slots 24 and bearing against the outside ofthe shell 21, serve by their shape and resiliency to hold the plate 3rotatably inv place and act as handles by which it may be turned. It isadvantageous, but not essential, that the plate 3 should act to entirelycutoff the gas, as a cock in the gas-fixture is ordinarily provided forthis purpose. It is important, however, that the flow of gas through theapertures 22 should not be deflected from a vertical line, as it islargely the upward movement of the gas which acts after the manner of aninjector to draw in a sufficient supply of air to mix therewith. It isfound in practice that the diagonal lozengeshaped slots 32 in the plate3 are well adapted to cut off a part of the gas, as shown in dottedlines, Fig. V, without deflecting it from a vertical line ordisproportionately checking the flow, and that in these respects theyare superior to the ordinary round apertures.

The principal advantage of the diagonal oval or lozenge-shaped slotsover the round holes is in the greater motion of the plate required toclose or open the apertures,whereby a more accurate adjustment issecured by an unskilful operator.

I am aware that many mechanical alterations, as reversing of the partsand other diameters greater than another diagonallydisposed in saidplate and adapted to be turned into and out of register withsaid-firstnamed aperture, substantially as described.

2. In a gas-burner in combination a burnerbase, a chamber above saidbase, a shell formin g part of said chamber having an aperture, one ormore, for the passage of gas, a registering plate having an aperture,one or more, adapted to be turned into and out of register with saidfirst-named aperture, the central portions of said shell and said platesurroundingsaid apertures being dished or depressed to fit one into theother, substantially as described.

3. In a gas-burner in combination a burner base, a chamber above saidbase, a shell forming part-of said chamber, having an aperture,

one or more, for the passage of gas, slots in said shell exterior tosaid burner-base, a registering plate having an aperture, one or more,adapted to be turned into and out of register with said first-namedaperture and lugs on said plate passing through said slots and bent orformed to engage with the outer surface of said shell and to hold saidplate in contact therewith, substantially as described.

4. In a gas-burner in combination a burnerbase, a chamber above saidbase, a shell forming part of said chamber having a depressed piercedcentral portion within said burnerbase an'dslots exterior to'said base,a registering plate having a depressed pierced central portion adaptedto fit within said shell and lugs on said plate passing through saidslots and bent or formed to engage withthe outer surface of said shelland to hold said plate in rotary contact therewith, substantially asdescribed.

SAMUEL G. STODDARD.

Witnesses:

Gno. L. COOPER, FRANK RHIND.

